[bash] `get` and `set` bash completions

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 88.85%. Comparing base (8935cfa) to head (fe4f4a1). Report is 6 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #3550 +/- ## ======================================= Coverage 88.85% 88.85% ======================================= Files 253 253 Lines 14168 14173 +5 ======================================= + Hits 12589 12594 +5 Misses 1579 1579 ```

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